| 摘要 |
PROBLEM TO BE SOLVED: To obtain noise cancelling headphones capable of realizing both improvement of sound quality and noise cancelling performance.SOLUTION: Noise cancelling headphones include: a first driver unit 1 for reproducing a low sound range; another driver unit 2 for reproducing sound ranges other than the low sound range; a crossover circuit 3 which allocates musical sound signals to the low sound range and the sound ranges other than the low sound range, inputs musical sound signals of the low sound range in the first driver unit 1, and inputs musical sound signals of the sound ranges other than the low sound range in the another driver unit 2; and a noise cancelling circuit 4 which generates cancelling signals from noise signals of all frequency bands which can be detected by a microphone 6 to be input in the first driver unit 1. |
